package com.joy.duowei.product.controller;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.joy.duowei.product.entity.CategoryEntity;
import com.joy.duowei.product.service.CategoryService;
import com.joy.common.utils.PageUtils;
import com.joy.common.utils.R;



/**
 * ??Ʒ???????
 *
 * @author joy
 * @email joy@gmail.com
 * @date 2022-08-01 17:17:23
 */
@RestController
@RequestMapping("product/category")
public class CategoryController {
    @Autowired
    private CategoryService categoryService;

    /**
     * 查出所有分类以及子分类，以树形结构组装起来
     */
    @RequestMapping("/list/tree")
    public R list(){
        //查找到所有分类
        List<CategoryEntity> entities = categoryService.listWithTree();
        //组装成树形结构返回
        List<CategoryEntity> level1Menus = entities.stream().filter(categoryEntity ->
             categoryEntity.getParentCid() == 0).map((menu)->{
                 menu.setChildren(getChildren(menu,entities));
                 return menu;
        }).sorted((menu1,menu2)->{
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());
        return R.ok().put("data", entities);
    }

    //获取每一个菜单的子菜单
    private List<CategoryEntity> getChildren(CategoryEntity root,List<CategoryEntity> all){
        List<CategoryEntity> children = all.stream().filter(categoryEntity -> {
            return categoryEntity.getParentCid() == root.getCatId();
        }).map(categoryEntity -> {
            //在找子菜单里是否有孙菜单
            categoryEntity.setChildren(getChildren(categoryEntity, all));
            return categoryEntity;
        }).sorted((menu1, menu2) -> {
            return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
        }).collect(Collectors.toList());
        return children;
    }

    /**
     * 信息
     */
    @RequestMapping("/info/{catId}")
    //@RequiresPermissions("product:category:info")
    public R info(@PathVariable("catId") Long catId){
		CategoryEntity category = categoryService.getById(catId);

        return R.ok().put("data", category);
    }

    /**
     * 保存
     */
    @RequestMapping("/save")
    //@RequiresPermissions("product:category:save")
    public R save(@RequestBody CategoryEntity category){
		categoryService.save(category);

        return R.ok();
    }


    /**
     * 修改排序 11
     */
    @RequestMapping("/update/sort")
    //@RequiresPermissions("product:category:update")
    public R updateSort(@RequestBody CategoryEntity[] category){
        //参数是一个集合 所以要转成集合
        categoryService.updateBatchById(Arrays.asList(category));
        return R.ok();
    }

    /**
     * 修改
     */
    @RequestMapping("/update")
    //@RequiresPermissions("product:category:update")
    public R update(@RequestBody CategoryEntity category){
		categoryService.updateById(category);
        return R.ok();
    }

    /**
     * 删除
     * @RequestBody 获取请求体 必须发送POST请求
     * SpringMvc自动将请求体的数据（josn） 转为对应的对象
     */
    @RequestMapping("/delete")
    public R delete(@RequestBody Long[] catIds){

        //1、检查当前删除的菜单 是否被别的地方引用
        categoryService.removeMenuByIds(Arrays.asList(catIds));
        return R.ok();
    }

}
